Rabble furnace



May 15K, 1928.

A; N. JETTE RABBLE FURNACE Filed Sept. B, 1926 Patented May 15, 1928.

UNITED, STATES PATENT OFFICE.

ABCEIE NOEL JETTE, F ANACONDA, MONTANA.

BABELE rammen.

Application led September v8, 1926. Serial No. 134,273.

or equivalent refractory material, separated kfrom the shaft by an airspace, and supported by means of suitable rings attached to the centralshaft at the level of each hearth.

This means of supporting the mantle is disadvantageous in that thebrick-Work is not very firmly supported and the motion of the shaftfrequently causes the component bricks to drop out, thus exposing theshell of the central shaft.

This invention has for. its object to provide an improved method ofsupporting and.

retaining the brick-work of the mantle with a view to increasing theworking period of the same. y

It has been found that superior results are obtained by the use of metalreinforcing rods `which engage thebricks at points on their verticalmeeting faces, which reinforcing rods rest upon the supporting rings andengage the inner circumferential surfaces of flan es positioned upon theupper and lower surfgaces of said rings. As a result of this method ofreinforcement the bricks are held firmly in place in the mantle, and thelife of the mantle is increased.

Any suitably constructed furnace structure capable of handling thematerial to be treated may be utilized in connection with the presentinvention. A

For a full understanding of the invention perspective 4view` of asingleor use in' the construction of ferent types are so well known that forthe sake of simplicity the furnace proper will be indicated only by theportions of the 4 hearths 9 adjacent the central shaft.

reference is made to the accompanying.

According to this invention the bricks 1 employed for this type ofconstruction have complementary recesses 10 at the midpoint of each endface, semi-circular in cross-section, and of al radius slightly greaterthan the reinforcing rod 5. The method of constructing the mantlepreferably is asv follows. One complete vertical course of brick 1 islaid upon the supporting ring 2 attached to the shell of the cent-ralshaft 3, in 'such manner that the semi-circular,` recesses at the endsof said bricks register. The mantle preferably is of such insidediameter as to allow a suitable air space 4 between the mantle and theshell 3 of the central shaft. Reinforcing rods 5 are then setvinto placein the circular recesses between the bricks, and

the next complete vertical vcourse is laid,

continuing thus until the mantle is completed.

i The reinforcing rods are held in place by the inner circumferentialsurfaces of annular flanges 6 positioned upon the upper and lowersurfaces of the supporting ring* 2.

I also propose an improved construction of a lute ring which isapplicable to the mantle structure herein disclosed. In a previousUnited States` v:Patent No. 1,535,160, dated April 28,1925, a lute ringconstruction was shown in which the lute. ring was placed upon. thesupporting ring 2 without being rigidly attached thereto, thuspermitting expansion or contraction of the one 'without affecting theother, and by this means preventing .breakage caused by unequalexpansion. A similar type of construction is to be employed inconnection with the present invention with the following change.' Figure1 of the Patent No. 1,535,160, shows a portion'of the lute ring .of sucha shape as to lie upon the upper surface of the rib of the supportingring 2 and positioned between the latter and the bottom vcourse ofbrick. I now propose to construct the lute ring 7 in the form shown inFigureV 1 of the accompanying drawings. The depending flange 8 of thelute ring 7, having the shape shown in the drawing, is fitted betweenthe upper fiange of the supporting ring 2 and the outer face of thebrick 1,and does not interfere with the retaining lugs 6 and thereinforcing rods 5.

It is obvious that changes in the forms of the several parts could beeffected without luz',

departingfrom the scope of the presentA invention. Thus, the recesses inthe end faces ofthe `bricks could be fashioned to effect contact with areinforcing rod which might be square, hexagonal or oval incrosssection. Or openings may be provided through the body portion ofthe bricks for the reception of the retaining rods. Likewise changes inthe exact form of the lute ring as shown might be made without departingfrom my invention which is particularly pointed out in the appendedclaims.

I claim: y

1. A rabble furnace of a type having an insulating mantle surrounding acentral' shaft and carried by supporting rings there'- on characterizedby the fact that. the bricks ycomposing said mantle are maintained ,in

position by vertically disposed reinforcing rods which pass through themantle and engage said supporting rings.

2. A rabble furnace as claimed in claim 1, wherein the meeting ends ofadjacent bricks are provided with complementary recesses which formvertical passages for the reception of said reinforcing rods.

3. n a rabble furnace, thecombination With a central shaft of supportingrings attached thereto and having annular flanges thereon, an insulatingmantle surrounding said central shaft and supported by said supportingrings, said mantle comprising brick- Work and vertically disposedreinforcing rods positioned Within recenses occurring 111 saidbrick-Work and retained by said annular flanges. v Y

4. A rabble furnace as claimed in claim 3 in Which an annular lute ringhaving a depending circular iange is supported on the outer flange of anannular supporting ring. In testimony whereof, I affixv my signature.

ARCI-IIE NOEL JETTE.

